'What did he look like?'

But the nurse was shaking his head. 'He was getting back in when I saw him. I just saw his back.'

'What kind of car was it?'

'Black 3-series, no mistake about that.'

'Oh, he's very good at noticing things, Inspector, except when it suits him.'

'Shut it, Macmillan.'

'Ask yourself this, Inspector. If this is a hospital, why are all the so-called "nurses" members of the Prison Officers' Association? This isn't a hospital, it's a warehouse, but full of headcases rather than packing cases. The twist is, the head-cases are the ones in charge!'

He was moving away from the wall now, walking on slow, doped legs, but his energy was unmistakable. Every nerve was blazing.

'Against the wall – '

'Headcases! I took her head off! God knows, I did – '

'Macmillan!' The nurse was moving too.

'But it was so long ago… a different – '

'Warning you -'

'And I want so much… so much to – '

'Right, that's it.' The nurse had him by the arms.

'-touch the earth.'

In the end, Macmillan offered little resistance, as the straps were attached to his arms and legs. The guard laid him out on the floor. 'If I leave him on the bed,' he told Rebus, 'he just rolls off and injures himself.'

'And you wouldn't want that,' said Macmillan, sounding almost peaceful now that he'd been restrained. 'No, nurse, you wouldn't want that.'

Rebus opened the door, making to leave.

'Inspector!'

He turned. 'Yes, Mr Macmillan?'

Macmillan had twisted his head so it was facing the door. 'Touch the earth for me… please.'

Rebus left the hospital on shakier legs than he'd entered it. He didn't want the tour of the pool and the gym. Instead, he'd asked the nurse to show him the punishment block, but the nurse had refused.

'Look,' he'd said, 'you might not like what goes on here, I might not like some of what goes on, but you've seen how it is. They're supposed to be "patients", but you can't turn your back on them, you can't leave them alone. They'll swallow lightbulbs, they'll be shitting pens and pencils and crayons, they'll try to put their head through the television. I mean, they might not, but you just can't ever be sure… ever. Try to keep an open mind, Inspector. I know it's not easy, but try.'

And Rebus had wished the young man luck with his weight training before making his exit. Into the courtyard. He stooped by a flowerbed and plunged his fingers deep into it, rubbing the soil between forefinger and thumb. It felt good. It felt good to be outside. Funny the things he took for granted, like earth and fresh air and free movement.

He looked up at the hospital windows, but couldn't be sure which, if any, belonged to Macmillan's ward. There were no faces staring at him, no signs of life at all. He rose to his feet, went to his car and got in, staring out through the windscreen. The brief sunshine had vanished. There was drizzle again, obscuring the view. Rebus pressed the button… and the windscreen wipers came on, came on and stayed on, their blades moving smoothly. He smiled, hands resting on the steering wheel, and asked himself a question.

'What happens to sanity when you chain it to a wall?'

He took a detour on his way back south, coming off the dual carriageway at Kinross. He passed Loch Leven (scene of many a family picnic when Rebus had been a kid), took a right at the next junction, and headed towards the tired mining villages of Fife. He knew this territory well. He'd been born and brought up here. He knew the grey housing schemes and the corner shops and the utilitarian pubs. The people cautious with strangers, and almost as cautious with friends and neighbours. Street-corner dialogues like bareknuckle fights. His parents had taken his brother and him away from it at weekends, travelling to Kirkcaldy for shopping on the Saturday, and Loch Leven for those long Sunday picnics, sitting cramped in the back of the car with salmon-paste sandwiches and orange juice, flasks of tea smelling of hot plastic.

And for summer holidays there had been a caravan in St Andrews, or bed and breakfast in Blackpool, where Michael would always get into trouble and have to be hauled out by his older brother.

'And a lot of bloody thanks I got for it.'

Rebus kept driving.

Byars Haulage was sited halfway up a steep hill in one of the villages. Across the road was a school. The kids were on their way home, swinging satchels at each other and swearing choicely. Some things never changed. The yard of Byars Haulage contained a neat row of artics, a couple of nondescript cars, and a Porsche Carrera. None of the cars was blue. The offices were actually Portakabins. He went to the one marked 'Main Office' (below which someone had crayoned 'The Boss') and knocked.

Inside a secretary looked up from her word-processor. The room was stifling, a calor-gas heater roaring away by the side of the desk. There was another door behind the secretary. Rebus could hear Byars talking fast and loud and uproariously behind the door. Since no one answered him back, Rebus reckoned it was a phone call.

'Well tell Shite-for-brains to get off his arse and get over here.' (Pause.) 'Sick? Sick? Sick means he's shagging that missus of his. Can't blame him, mind…'

'Yes?' the secretary said to Rebus. 'Can I help you?'

'Well never mind what he says,' came Byars' voice, 'I've got a load here that's got to be in Liverpool yesterday.'

'I'd like to see Mr Byars, please,' said Rebus.

'If you'll take a seat, I'll see whether Mr Byars is available. What's the name, please?'

'Rebus, Detective Inspector Rebus.'

At that moment, the door of Byars' office opened and Byars himself came out. He was holding a portable phone in one hand and a sheet of paper in the other. He handed the paper to his secretary.

'That's right, wee man, and there's a load coming up from London the day after.' Byars' voice was louder than ever. Rebus noticed that, unseen by her, Byars was staring at his secretary's legs. He wondered if this whole performance was for her benefit…

But now Byars had spotted Rebus. It took Byars a second to place him, then he nodded a greeting in Rebus's direction. 'Aye, you give him big licks, wee man,' he said into the telephone. 'If he's got a sick-note, fine, if not tell him I'm looking out his cards, okay?' He terminated the call and shot out a hand.

'Inspector Rebus, what the hell brings you to this blighted neck of the bings?'

'Well,' said Rebus, 'I was passing, and – '

'Passing my arse! Plenty of people pass through, but nobody stops unless they want something. Even then, I'd advise them to keep on going. But you come from round here, don't you? Into the office then, I can spare you five minutes.' He turned to the secretary and rested a hand on her shoulder. 'Sheena, hen, get on to tadger-breath in Liverpool and tell him tomorrow morning definite.'

'Will do, Mr Byars. Will I make a cup of coffee?'

'No, don't bother, Sheena. I know what the polis like to drink.' He gave Rebus a wink. 'In you go, Inspector. In you go.'

Byars' office was like the back room of a dirty bookshop, its walls apparently held together by nude calendars and centrefolds. The calendars all seemed to be gifts donated by garages and suppliers. Byars saw Rebus looking.

'Goes with the image,' he said. 'A hairy-arsed truck driver with tattoos on his neck comes in here, he thinks he knows the sort of man he's dealing with.'

'And what if a woman comes in?'

Byars clucked. 'She'd think she knew, too. I'm not saying she'd be all wrong either.' Byars didn't keep his whisky in the filing cabinet. He kept it inside a Wellington boot. From the other boot he produced two glasses, which he sniffed. 'Fresh as the morning dew,' he said, pouring the drinks.

'Thanks,' said Rebus. 'Nice car.'